Swift 2.0 - `nil`或`0'枚举参数 [英] Swift 2.0 - `nil` or `0` enum arguments

问题描述

我在Swift 2.0中遇到了几个功能，并想知道是否有工作。现在似乎没有办法在Swift 2.0中没有指定枚举参数。例如，这两种方法似乎需要不同于 nil 或 0 之类的东西。有没有办法这个？

I've run into this a on a couple functions in Swift 2.0 and wondering if there is a work around. There seems to be no way to not specify enum arguments in Swift 2.0 now. For example, these two methods seem to require something other than nil or 0 be passed in. Is there a way around this?

// Cannot invoke '...' with argument list of type ... options: Int
NSCalendar.currentCalendar().dateByAddingComponents(components, fromDate: self.date, options: 0)
NSJSONSerialization.JSONObjectWithData(data, options: 0)

// Cannot invoke '...' with argument list of type ... options: nil
NSCalendar.currentCalendar().dateByAddingComponents(components, fromDate: self.date, options: nil)
NSJSONSerialization.JSONObjectWithData(data, options: nil)

推荐答案

选项现在被指定为一个集合，所以只是通过一个空集： options：[] 。

Options are now specified as a set, so just pass an empty set: options: [].

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